There are contadicting sources concering the bottom stripe of
this flag. Here is what is said at this angelfire -
choco site:
"La bandera del Departamento del Chocó se compone de los
colores: VERDE (2/4), AMARILLO (1/4), GRIS (1/4)" .
"Gris" is grey but the image shows the bottom stripe as
silver.Dov Gutterman and Ole Andersen, 4 November 2000

The arrangament quoted in the appendix of the Constitution
seems some times not to be an warranty for knowing the correct
flag.Jaume Olle', 19 December 2000